Studies on Marine Flagellates VII. <i>Nephroselmis Gilva</i> Sp.Nov. and Some Allied Forms

Abstract

A new species provisionally attributed to the genus Nephroselmis has been described with the aid of light- and electron-microscopy. Significant features include the presence of a single layer of scales over the flagellar and cell surfaces as in Micromonas squamata Manton &amp; Parke, though the morphology of the flagellar scales is as in the outer scale layer of Pyramimonas and Halosphaera . Reasons are given for rejection of Thalassomonas on the grounds of nomen confusum and for homologizing various representatives of it with Micromonas squamata . Some additional facts about the latter include details of the imbrication of the flagellar scales and demonstration, made possible by the use of lead staining of sections, of a close association between golgi bodies and the scale-producing vesicles.